Drive Belts & Kits
Drive Belt Automatic Tensioners
Drive Belt Idler & Tensioner Pulleys
Overrunning Alternator Pulleys
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Timing Belt & Kits
Timing - Hydraulic Automatic Tensioners (HAT)
Shaft Repair Kits
Heater Tap Control Valves
Thermostats & Thermostat Gaskets
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Merchandisers

Automatic Belt Tensioners

Dayco® No Slack™ Automatic Belt Tensioner

Designed to maintain constant tension on serpentine belt drives
Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories.To maintain the proper tension throughout the drive, an automatic, spring-loaded tensioner is incorporated into the drive system geometry. Dayco’s Automatic Belt Tensioner features a patented “flat spring” design that’s engineered to provide less operating range variations in tension. This reduces the risk of premature accessory bearing failure due to high tension when a new belt is installed. It also lessens the risk of belt squeal and slippage, or poor accessory performance caused by low tension after the belt begins to stretch and wear. A Teflon® strip wound within the spring resists abrasion. The flat spring itself is coated to resist rust.

Other superior design features include a steel locator pin (where the application demands). A heavy-duty cast aluminum spring case resists cracking and fatigue. The heavy-duty cast aluminum arm offers additional strength and less distortion . An aluminum retainer ring locks the spring case and arm together, and seals against corrosion.A steel pivot tube (where the application demands) provides additional strength for critical torque requirements. A thermoplastic rubber “spring slot plug” keeps out harmful contaminants. The lubricated nylon “pivot tube bushing” and “spring bushing” promote quieter performance.A rubber “O” ring seals against dust and grime.The zinc coated mounting bolt resists rust, and is concentric for a more even degree of constant tension. In order to meet OEM performance standards, Dayco Automatic Tensioners come with either a glass-filled polymer (plastic) or steel pulley, that features a dust cover to protect against contaminants.


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Part numberDescription
132001Automatic belt tensioner
132002Automatic belt tensioner
132003Automatic belt tensioner
132004Automatic belt tensioner
132006Automatic belt tensioner
132007Automatic belt tensioner
132008Automatic belt tensioner
132009Automatic belt tensioner
132010Automatic belt tensioner
132011Automatic belt tensioner
132012Automatic belt tensioner
132013Automatic belt tensioner
132014Automatic belt tensioner
132015Automatic belt tensioner
138210Automatic belt tensioner (includes water seals)
138265Automatic belt tensioner
89213Automatic belt tensioner
89218Automatic belt tensioner
89224Automatic belt tensioner
89225Automatic belt tensioner
89230Automatic belt tensioner
89231Automatic belt tensioner
89245Automatic belt tensioner
89251Automatic belt tensioner
89252Automatic belt tensioner
89254Automatic belt tensioner
89255Automatic belt tensioner
89256Automatic belt tensioner
89257Automatic belt tensioner
89263Automatic belt tensioner
89267Automatic belt tensioner
89269Automatic belt tensioner
89280Automatic belt tensioner
89281Automatic belt tensioner
89286Automatic belt tensioner
89294Automatic belt tensioner
89295Automatic belt tensioner
89303Automatic belt tensioner
89304Automatic belt tensioner
89306Automatic belt tensioner
89311Automatic belt tensioner
89316Automatic belt tensioner
89318Automatic belt tensioner
89319Automatic belt tensioner
89321Automatic belt tensioner
89322Automatic belt tensioner
89323Automatic belt tensioner
89324Automatic belt tensioner
89325Automatic belt tensioner
89326Automatic belt tensioner
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